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A Hierarchical MoO 2 /Au/MnO 2 Heterostructure with Enhanced Electrochemical Performance for Application as Supercapacitor
Author(s) -
Zhang Xia,
Xu Yuandong,
Ma Ying,
Yang Min,
Qi Yanxing
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500501
Subject(s) - supercapacitor , electrochemistry , chemistry , heterojunction , horizontal scan rate , capacitance , diffusion , ion , chemical engineering , nanotechnology , optoelectronics , electrode , cyclic voltammetry , materials science , physics , organic chemistry , engineering , thermodynamics
Abstract A hierarchical MoO 2 /Au/MnO 2 heterostructure was prepared by a two‐step electrodeposition method. The ion‐diffusion and charge‐collection capacity improved after spraying a Au layer. Electrochemical tests show that the areal specific capacitance for MoO 2 /Au/MnO 2 is up to 112 mF cm –2 at a scan rate of 5 mV s –1 . Furthermore, the obtained MoO 2 /Au/MnO 2 heterostructure also displays an excellent rate capability and remarkable cycling stability.